Excavating scoop or dipper.



G. L. MOKENZIB. BXGAVATING S0001 0R DIPPER; Arrmomlou Hum nov. 15, 1909.

Patent-,ea Aug. 16,1910.

2 SHEETS-SHEET 1.

G. L. MUKENZIE.` EXGAVATING scooP 0R DIEPER.

APPLICATION FILED NOV. 15, 1909. 967,81 9. Patented Aug. 16, 1910.

' n SHEETS-SHEET 2.

and exact l description. -o

CHARLES ILIIYIGKENZIE,l PITTSBU'G, PENNSYLVANIA.

To all who'mfit may concern. Be it lmown that I, CHARLES L. MGKEN- zm, acitizenof the United States, and-resident of Pittsburg, countyofAllegheny, and State of Pennsylvania, have invented certainv new anduseful Improvements in EX- cavating Scoops or Dippers; and Ifdo hereby"declarethe followin to be' a full, clear, the-invention, such 4as willenable Aothersskilledin the' art to which4 it. appertains to- `makeanlduse the same.

This,inventionl relates to shovels, scoops or dippers that are .used forexcavating'purposes, and has. particular reference tothe construction,means of attachment andarrangementfof the'` teeth that are often appliedto the forward edge cfa steam shovel `orscoop where; it enters the earthor other -material to lbe excavated. f

bent out'of shape, and again the .variousmethods of applying the teethhave had the defect that they do not provide for the adjustment of thelatter as they become worn, nor their ready application to anddetachment from the shovel or dippen The, object of the presentinvention is to.l overcome th-e'sefdrawbacks and provide az-betterandycheaper means of attachment for yfthe teeth or points; aconstruction in which the dipper shell or shovel is strongly rein-`forced at its forward edge; 'and improved 4.means for bracing that partofthe dipper or shovel most subject vto wearj and strain, in

such a way as to prolong the use of the clevicewitho'ut repairsandgreatly reduce the expense gof'rthes e repairsA when needed:

p In thev cconipanying 'drawingz-Flgure -1` isv aV [fIOntie-levatin ofya shovel or. dipper constructionQinvolving the invention, thev 4teethbeing removed; Fig. l2 is aI longitudinal-Sectionthrough the bottom ofthe d1p per; Fig.' 2a isa detail front ,'viewl showing onefof the teethin positiong-Figs. 3 and 4 `are views.- corresponding to Figs. 1 and. 2,

TED sTATEs PATENT oEEioE.

nxcAvATiNe scoor on 'Dirrnia Specification of Letters Patent. PateApplication :filed November 15, 1909.* Seria1jNo- 528,042y

. In the form of v'the*deviceif?illustratediin "beneath the base flangelioff't'heftholiersfor" ,sockets are the usuall' shoes 17, and it willfbottom. Iny the di h en the teeth is trai,

,cavation, but it 1s 'ap `held by friction ijf created by the USl1 ilze:

but illustrating a tfoilitioffithe'iconstruction; Figs. 5 andGlillustrateaa s till'further modied form; Eig.y 7 iis-:a detailv.per-

spective view .offonefzfof the.keepers- .or`6o tudinal sectionthrouighvazflholde orakeeper with a modified form? of stopfinfcon'nection therewith. i f I.

In the drawing, th is illustratedjas beingo scoop shaped-f1 lfform,

Ahaving a at bottoml-l. I@ and jupright@A side walls 12, but I wishAitlto befdist'inctlyvunderstood that the formofthefshovel ordipperiswholly vimmaterial 'tofV the invention, which resides solely in'the"constiju'ction and i `arrangement ofthe.cuttingteethand'fthatftparticular part of the shovelA l"orfdipper:towhich they are applied. -l c Figs. l, 2 and 2, the-teeth 13' fareifrictionally held in a series of l-sockc'stsf"formed .Eby vU- shapedkeepers'or lloldlersthat riveted to thebottom 11. keepers? 14 are placedside bytside p .j "tiet, tion and are riveted means"offrivetsr15 thatpass through theifroutstanidinglaterally directed base flanges" 6.'1Applfie'd ttofthe under surface of thesh points held in place bym'awhich pass down through the bottom` and said shoes Fig. 1. In this,forniw y i v U-'shaped plates orf/hblders lf'extend'ior- `ward of theshovel''bottoniV E1toacertain lexbeneath all of thekfeepers abutstatlitsrear edge. against theft-front' dgelf th shovel said reinforcingbar"20-` twice the thicknes find that this consti ctioV one for stronglyr "nforcin dipper at its forwaf arrangement illustra' to under all condAs previously 1n na 771i1"110 and this is effected by driving said teethy into their sockets, in which they do not fit tightly. The openingofthe socket should .be fractionally larger than the tooth, vso

that .the tooth can be inserted without hard driving and also removedeasily. The tooth may be held firmly enough to prevent its falling outwhenthe shovelbottom is tilted forward, by driving in a small wooden ormetal wedge. A nail will answer the purpose.. When once put in place theteeth will .not become dislodged during excavation for the reasonthatthe diggin -action always tends to force them back an wedge them intheir sockets, as will be understood.V vAt the rear of each keeper orholder there is provided an interior stop 19 to prevent -thetooth fromworking too'far'back, andv said stopl preferably takes the formof an andin. the. latter figure', it is indicated angle :piece such as .thatillustrated, riveted to theholder top',as indicated at 21. iThisarrangement i's also'shown 1n Figs. 4 to 6,

how a filler block 2 2 may .be interposed between the fixedstop and thebutt end of the tooth as the latter becomes worn. As ay rotect-ionto,prevent wear of the..

' 4fronten of 'each-,keeper plate 14 and of the vforward edge of ftheprotecting or-reinforc ing bar 20,1 provide a washery 23. that slipsover the tooth and bears 4against the forward edges ofthe correspondingkeeper plate. and reinforcing bar, as shown 1n Figs.2 and 2a.

Said washer'can be secured in plac-y )y any sultable means, forlnst'ance.,` the small screws 24 that are screwed into the keeper plateI edge'of the shovel or dipper bottom `is vnot 40 and reinforcing bar inhorizontal direction. .By the construction described, theforward onlyreinforced in a very simple and effective manner, butalso -thisreinforcement forms a part of the teeth attaching means, yso that thereis a-rm and durable connection between ,the teeth andthe yshovel bot--tom combined with the advantage that the strain exerted. on the teethjisso transmitted tothe shovel Abottom and distributed that there can benobending of the' latter. i The manner` of attaching the shoes 17- is'also factitive in bringingabout these results, aslthe shovel bottom isnot only .reinforced and.

rotected at., its top surface and front edge but also at' its lowersurface.y It Iwill be manifest that during/excvationthe prying pressureon the shovelfteeth that takes place Iwhen a vload is scooped up in theshovel or dipper is transferred tothe reinforcing bar and vthe keeperplates rather than to the edge of they dipper shell.

It is to be understood that the cross sectional form of the cuttingteeth' is entirely immaterial to" the inventlon, and that the 1 keeperplates and washers areV made to conform to the teeth. y IThe fact that-these lathw m ne @imma {1m-m and aan be verv readthe plate and bottomat ily 'attached and detached will appeal to .those who realize theimportance of these features. The keeper plates, which are the parts ofmy device requiring themost work to replace, will not wear or 'becomebroken or deformed aszre'adily as other ordinarily .used devices, and,therefore, will less frequently need to be replaced.- It is also evidentthat the manufacture of the reinforcing'bar,` kee er be readily e ectereinforcing bar, which takes the' frictional plates and other artscanwear between lthe teeth, canreadily and at small cost, an that the4cheaply be replaced, whereas, in the, most v common form of dip er, thelip (a large, heavy, .forged curve' plate) is expensive both to buyand'to attach. im rovedsystem of attachment is adapted' tov s ovels ofwidelyY varying types, irrespective of their provision with the ordinaryprotectl ing lips usually employed.`

In fFigs. 3 and 4, 1 have indicated a modi.-

forcement on the lower surface of the shovel l6r dipperis afforded4 .Inthis form, the

' i, Instead of vusin teeth 13 are driven into the sockets inthe usual.way, against the stops 19, the-washer 23 being placed nexttothe plate 25and dipperbottom at the forward edges of the latter,

, Inthe formv shown in Figs. 5 and 6,. the larrangement is similar to'.that keeperplates `14extend up to and not beyond, the forward ed e ofthe shovel 4or clipper, the reinforcing ar 20 bein applied to the lowersurface of' the shove bottom :instead of in advance of' the same. Ofcourse, this-necessitates the setting back of the reinforcing shoes 17toa certam extent, but they extend into abutment at their forward lendswith the reinforcing bar, just as before.

a fixed stop butt of each tooti and inserting a filler block 22, whenthe f tooth becomes' worn, I

-may'employ an adjustable stop 28, pas indicated in`F1g ..-8, sothatthetooth, as itbecomes worn, may' be ad'usted in forward direction.In the lembo iment illustrated,

the stop 28 is formed of an angle piece, as

own 1n- Figs. 1 and' 2 with-the exception that 'the 19 .l at the before,the adjustment being effected by means of a nutted bolt 29 carried bythe angle piece and movable in a longitudinal slot .14x in the top 'ofthe keeper plate or `011e of the important-features of the in" kvention'is the application of the' holder or keeper plate to one surfaceof the shovel taken 1n connection with thel fact that the tooth that is`inserted in such holder or keeper 'plate' lies Wholly on said surfaceof the shovel or substantially so, withoutit being necessary tobifurcate or slit the tooth se that itwill engage the bottom at oppositesurfaces. y

ft is apparent that I have not 'attempted to describe all of the variousmodifications of 1l the. construction that maybe adopted with outdigressing from my inventive idea.

at Il claim is j L .Thecombination with av dipper bottom, of' a U-Shapedholder plate flanges riveted to said bottom, a tooth inserted betweensaid plate and the dipper bottom, and an' interior stop Within theholder plate-to limit the rearward'movement ofthe tooth.'

2. The combination with a dipperbottom,

of a U-shape'd holder flanges riveted to saidbottom, a tooth insertedbetween said plate and the dipper bottom, and an interior stop withinthe holder plate to limit the rearward. movement cf the tooth, said stopcomprising `van angle piece appliedvto the top of the holder plate.

3. In a dipper construction, tom, a U`shaped holder plate projectingbeyond the'forward edgeof said bottom, and

a tooth inserted in said holder plate.

4. In a dipper construction, a dipper botm tom, a holder plate appliedto' the uppern surface t-hereof,f .andextending beyond the o forwardedge of said bottom. a tooth held by said plate, anda reinforcing bar towliichthe forward end of the'hol'der plate is secured.

a dipper construction, a dipper bot- 't aholder `plate applied tio theupper et' surfacethereof, a tooth held'by-the holder plate, and areinforcing bar extending across -the forward end of the dipper beneaththe .holder plate.

6. In adipper construction, a dipper bot- 50- tom, aholderplat-e appliedto one surface l hereof and affording a socket, a tooth held i'n saidsocket, a reinforcingbar extending beneaththe' forward end of the holderplate,

, anda reinforcing rib or shoe applied to the e5 l'surface of the bottomthat is 'opposite the holder plate.

7. In a dipper constructioma dipper bote torn, a holder plate applied toone surface'.

thereof and affording a socket, a tooth h eld in said socket, areinforcing'bar extending beneath the forward end of the holder plate,and a .reinforcing rib or shoe applied to the surface -of the bottomthat is- `opposite the holder plate and extending into abutment v"withthe Vreiiziforcing bar.

tom, a holder p1 having base tom,

holder p1ate, plate having basey a dipper botboth the keeper dipperbottom.

8. The combination with a di per bottom, of a plurality of U-shaped tootholders or common reinforcing bar extending along the forward edge ofthe dipper bottom and to which said holders or keepers. are secured.

9. In a d ipper construction, adipper bottom, a plurality of holders orkeepers applied to the upper surface thereof, and a common reinforcingbar extending along the forward edge of the dipper bottom beneath saidkeepers or holders.

" 10. .In adipper construction, al dipper botate applied to the uppersurface thereof, a reinforcing bar extending along the edge of thebottom beneath said' holder plate, a tooth secured between the holderplate and the 4dipper bottom, and a washer surrounding the tooth andabutting against the forward edge of the holder plate.

1 1. In a dipper construction, a dipper bota holder plate applied to theupper surface thereof, a reinforcing bar extending along the edge of thebottom beneath said a tooth secured between the eepers applied to onesurface thereof, and a holder plate and the dipper bottom, antifa washersurrounding the tooth and securedto the forward edges of the holderplate reinforcing bar.

12.' In a dipper construction, a dipper'bot?l tom, a holder plateapplied to theupper surface thereof and extending beyond the l forwardedge of said bottom, anda rein# forcing bar extending along and inabutment .with said lforwardedge and secured tothe holder plate whereitoverhangs the dipper bottom. I

13. In a dipper construct-ion, a dipper bottom, a tooth holding plate orkeeper having flanges lying on one surface of the bottom, reinforcingshoes at the opposite surface of the, bottom, and rivets that securev14. In a dipper construction, a dipper bote tom,a Uehaped holderplatelat the upper surface thereof and pr flanges, dipper bottom and in linewith said base flanges, and rivets that pass through the base flanges,shoes. v

l5. The combination of a holder applied to a shovel bottom and affordinga socket, a tooth held in said holder, .and means within flanges and theshoes to the ovided with base' shoes or reinforcing ribs beneath the iooilos

the rear part of the holder to' regulate the forward ad}ustment of thetooth, to compensate for wear.

In testimony whereof I affix my' signature, in presence of twowitnesses.

CHARLES L. MCKENzi. Witnesses: y

' T. C. HiGKsoN,

' JNO. TAYLOR.

the dipperbottom, and-the

